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{"acknowledgement": "Red Hat would like to thank ISC for reporting this issue. Upstream acknowledges Greg Kuechle (SaskTel) as the original reporter.", "affected_release": [{"advisory": "RHSA-2021:3325", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "bind-32:9.11.4-26.P2.el7_9.7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2021-08-31T00:00:00Z"}, {"advisory": "RHSA-2021:4384", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "bind-32:9.11.26-6.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-11-09T00:00:00Z"}, {"advisory": "RHSA-2021:4384", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "bind-32:9.11.26-6.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-11-09T00:00:00Z"}], "bugzilla": {"description": "bind: Broken inbound incremental zone update (IXFR) can cause named to terminate unexpectedly", "id": "1953849", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1953849"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-617", "details": ["In BIND 9.8.5 -> 9.8.8, 9.9.3 -> 9.11.29, 9.12.0 -> 9.16.13, and versions BIND 9.9.3-S1 -> 9.11.29-S1 and 9.16.8-S1 -> 9.16.13-S1 of BIND 9 Supported Preview Edition, as well as release versions 9.17.0 -> 9.17.11 of the BIND 9.17 development branch, when a vulnerable version of named receives a malformed IXFR triggering the flaw described above, the named process will terminate due to a failed assertion the next time the transferred secondary zone is refreshed.", "Incremental zone transfers (IXFR) provide a way of transferring changed portion(s) of a zone between servers. An IXFR stream containing SOA records with an owner name other than the transferred zone's apex may cause the receiving named server to inadvertently remove the SOA record for the zone in question from the zone database. This leads to an assertion failure when the next SOA refresh query for that zone is made."], "mitigation": {"lang": "en:us", "value": "Disabling incremental zone transfers (IXFR) by setting \"request-ixfr no;\" in the desired configuration block (options, zone, or server) prevents the failing assertion from being evaluated."}, "name": "CVE-2021-25214", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "bind", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "bind97", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "bind", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "bind", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-04-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-25214\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-25214\nhttps://kb.isc.org/docs/cve-2021-25214"], "threat_severity": "Moderate"}

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